package ray.create;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.ShellRunner;
import org.mybatis.generator.api.dom.java.*;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;

import java.util.List;
/** 
 * <pre> 
 * add pagination using mysql limit. 
 * This class is only used in ibator code generator. 
 * </pre> 
 */
public class MysqlPaginationPlugin extends PluginAdapter {  
    @Override  
    public boolean modelExampleClassGenerated(TopLevelClass topLevelClass,  
            IntrospectedTable introspectedTable) {  
        // add field, getter, setter for limit clause   
        addLimit(topLevelClass, introspectedTable, "limitStart");  
        addLimit(topLevelClass, introspectedTable, "limitEnd");  
        return super.modelExampleClassGenerated(topLevelClass,  
                introspectedTable);  
    }

    public static void generate() {
        String config = MysqlPaginationPlugin.class.getClassLoader().getResource(
                "mybatisConfig.xml").getFile();
        String[] arg = {"-configfile", config, "-overwrite"};
        ShellRunner.main(arg);
    }
    private void addLimit(TopLevelClass topLevelClass,  
            IntrospectedTable introspectedTable, String name) {  
        CommentGenerator commentGenerator = context.getCommentGenerator();  
        Field field = new Field();  
        field.setVisibility(JavaVisibility.PROTECTED);  
        field.setType(FullyQualifiedJavaType.getIntInstance());  
        field.setName(name);  
        field.setInitializationString("-1");  
        commentGenerator.addFieldComment(field, introspectedTable);  
        topLevelClass.addField(field);  
        char c = name.charAt(0);  
        String camel = Character.toUpperCase(c) + name.substring(1);  
        Method method = new Method();  
        method.setVisibility(JavaVisibility.PUBLIC);  
        method.setName("set" + camel);  
        method.addParameter(new Parameter(FullyQualifiedJavaType  
                .getIntInstance(), name));  
        method.addBodyLine("this." + name + "=" + name + ";");  
        commentGenerator.addGeneralMethodComment(method, introspectedTable);  
        topLevelClass.addMethod(method);  
        method = new Method();  
        method.setVisibility(JavaVisibility.PUBLIC);  
        method.setReturnType(FullyQualifiedJavaType.getIntInstance());  
        method.setName("get" + camel);  
        method.addBodyLine("return " + name + ";");  
        commentGenerator.addGeneralMethodComment(method, introspectedTable);  
        topLevelClass.addMethod(method);  
    }  
    /** 
     * This plugin is always valid - no properties are required 
     */  
    public boolean validate(List<String> warnings) {  
        return true;  
    }

    @Override
    public boolean sqlMapSelectByExampleWithoutBLOBsElementGenerated(
            XmlElement element, IntrospectedTable introspectedTable) {
        // XmlElement isParameterPresenteElemen = (XmlElement) element.getElements().get(element.getElements().size() - 1);
        XmlElement isParameterPresenteElemen = element;
        XmlElement isNotNullElement = new XmlElement("if"); //$NON-NLS-1$
        isNotNullElement.addAttribute(new Attribute("test", "limitStart > -1"));
        isNotNullElement.addElement(new TextElement("limit ${limitStart} , ${limitEnd}"));
        isParameterPresenteElemen.addElement(isNotNullElement);
        return super.sqlMapUpdateByExampleWithoutBLOBsElementGenerated(element, introspectedTable);
    }
    public static void main(String[] args) {  
        generate();  
    }  
}  
